diff --git a/ui/components/ChatWindow.tsx b/ui/components/ChatWindow.tsx
index b26573f..1be4ec5 100644
--- a/ui/components/ChatWindow.tsx
+++ b/ui/components/ChatWindow.tsx
@@ -1,17 +1,18 @@
 'use client';
 
-import { useEffect, useRef, useState } from 'react';
-import { Document } from '@langchain/core/documents';
+import {useEffect, useRef, useState} from 'react';
+import {Document} from '@langchain/core/documents';
 import Navbar from './Navbar';
 import Chat from './Chat';
 import EmptyChat from './EmptyChat';
 import crypto from 'crypto';
-import { toast } from 'sonner';
-import { useSearchParams } from 'next/navigation';
-import { getSuggestions } from '@/lib/actions';
-import { Settings } from 'lucide-react';
+import {toast} from 'sonner';
+import {useSearchParams} from 'next/navigation';
+import {getSuggestions} from '@/lib/actions';
+import {Settings} from 'lucide-react';
 import SettingsDialog from './SettingsDialog';
 import NextError from 'next/error';
+import {Mcid} from "@/lib/mcid";
 
 export type Message = {
   messageId: string;
@@ -140,7 +141,7 @@ const useSocket = (
           if (
             Object.keys(chatModelProviders).length > 0 &&
             (((!openAIBaseURL || !openAIPIKey) &&
-              chatModelProvider === 'custom_openai') ||
+                chatModelProvider === 'custom_openai') ||
               !chatModelProviders[chatModelProvider])
           ) {
             const chatModelProvidersKeys = Object.keys(chatModelProviders);
@@ -173,7 +174,7 @@ const useSocket = (
                 Object.keys(chatModelProviders[chatModelProvider]).length > 0
                   ? chatModelProvider
                   : Object.keys(chatModelProviders)[0]
-              ],
+                ],
             )[0];
             localStorage.setItem('chatModel', chatModel);
           }
@@ -382,10 +383,10 @@ const loadMessages = async (
   setIsMessagesLoaded(true);
 };
 
-const ChatWindow = ({ id }: { id?: string }) => {
+const ChatWindow = ({id}: { id?: string }) => {
   const searchParams = useSearchParams();
   const initialMessage = searchParams.get('q');
-
+  const [userId, setUserId] = useState<string | undefined>();
   const [chatId, setChatId] = useState<string | undefined>(id);
   const [newChatCreated, setNewChatCreated] = useState(false);
 
@@ -410,6 +411,7 @@ const ChatWindow = ({ id }: { id?: string }) => {
 
   const [focusMode, setFocusMode] = useState('webSearch');
   const [optimizationMode, setOptimizationMode] = useState('speed');
+  const [copilotEnabled, setCopilotEnabled] = useState(true);
 
   const [isMessagesLoaded, setIsMessagesLoaded] = useState(false);
 
@@ -417,6 +419,33 @@ const ChatWindow = ({ id }: { id?: string }) => {
 
   const [isSettingsOpen, setIsSettingsOpen] = useState(false);
 
+  useEffect(() => {
+    const initializeUserId = () => {
+      try {
+        // 从 localStorage 读取现有用户 ID
+        const storedUserId = localStorage.getItem('userId');
+
+        if (storedUserId) {
+          setUserId(storedUserId);
+          console.debug('Using existing user ID:', storedUserId);
+        } else {
+          const newUserId = new Mcid().generate().toString(); // 转换为字符串
+
+          localStorage.setItem('userId', newUserId);
+          setUserId(newUserId);
+          console.debug('Generated new user ID:', newUserId);
+        }
+      } catch (error) {
+        console.error('Error initializing user ID:', error);
+        const fallbackId = "1234567890";
+        localStorage.setItem('userId', fallbackId);
+        setUserId(fallbackId);
+      }
+    };
+
+    initializeUserId();
+  }, []);
+
   useEffect(() => {
     if (
       chatId &&
@@ -437,7 +466,7 @@ const ChatWindow = ({ id }: { id?: string }) => {
     } else if (!chatId) {
       setNewChatCreated(true);
       setIsMessagesLoaded(true);
-      setChatId(crypto.randomBytes(20).toString('hex'));
+      setChatId(new Mcid().generate().toString());
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
@@ -465,7 +494,7 @@ const ChatWindow = ({ id }: { id?: string }) => {
     } else {
       setIsReady(false);
     }
-  }, [isMessagesLoaded, isWSReady]);
+  }, [isMessagesLoaded, isWSReady, userId]);
 
   const sendMessage = async (message: string, messageId?: string) => {
     if (loading) return;
@@ -481,11 +510,12 @@ const ChatWindow = ({ id }: { id?: string }) => {
     let recievedMessage = '';
     let added = false;
 
-    messageId = messageId ?? crypto.randomBytes(7).toString('hex');
+    messageId = messageId ?? new Mcid().generate().toString();
 
     ws.send(
       JSON.stringify({
         type: 'message',
+        useerId:userId,
         message: {
           messageId: messageId,
           chatId: chatId!,
@@ -556,7 +586,7 @@ const ChatWindow = ({ id }: { id?: string }) => {
         setMessages((prev) =>
           prev.map((message) => {
             if (message.messageId === data.messageId) {
-              return { ...message, content: message.content + data.data };
+              return {...message, content: message.content + data.data};
             }
 
             return message;
@@ -589,7 +619,7 @@ const ChatWindow = ({ id }: { id?: string }) => {
           setMessages((prev) =>
             prev.map((msg) => {
               if (msg.messageId === lastMsg.messageId) {
-                return { ...msg, suggestions: suggestions };
+                return {...msg, suggestions: suggestions};
               }
               return msg;
             }),
@@ -639,19 +669,19 @@ const ChatWindow = ({ id }: { id?: string }) => {
             Failed to connect to the server. Please try again later.
           </p>
         </div>
-        <SettingsDialog isOpen={isSettingsOpen} setIsOpen={setIsSettingsOpen} />
+        <SettingsDialog isOpen={isSettingsOpen} setIsOpen={setIsSettingsOpen}/>
       </div>
     );
   }
 
   return isReady ? (
     notFound ? (
-      <NextError statusCode={404} />
+      <NextError statusCode={404}/>
     ) : (
       <div>
         {messages.length > 0 ? (
           <>
-            <Navbar chatId={chatId!} messages={messages} />
+            <Navbar chatId={chatId!} messages={messages}/>
             <Chat
               loading={loading}
               messages={messages}
@@ -668,6 +698,8 @@ const ChatWindow = ({ id }: { id?: string }) => {
           <EmptyChat
             sendMessage={sendMessage}
             focusMode={focusMode}
+            copilotEnabled={copilotEnabled}
+            setCopilotEnabled={setCopilotEnabled}
             setFocusMode={setFocusMode}
             optimizationMode={optimizationMode}
             setOptimizationMode={setOptimizationMode}
diff --git a/ui/components/EmptyChat.tsx b/ui/components/EmptyChat.tsx
index c47c301..0acd4ea 100644
--- a/ui/components/EmptyChat.tsx
+++ b/ui/components/EmptyChat.tsx
@@ -8,6 +8,8 @@ const EmptyChat = ({
   sendMessage,
   focusMode,
   setFocusMode,
+  copilotEnabled,
+  setCopilotEnabled,
   optimizationMode,
   setOptimizationMode,
   fileIds,
@@ -18,6 +20,8 @@ const EmptyChat = ({
   sendMessage: (message: string) => void;
   focusMode: string;
   setFocusMode: (mode: string) => void;
+  copilotEnabled: boolean;
+  setCopilotEnabled: (enabled: boolean) => void;
   optimizationMode: string;
   setOptimizationMode: (mode: string) => void;
   fileIds: string[];
@@ -44,6 +48,8 @@ const EmptyChat = ({
           sendMessage={sendMessage}
           focusMode={focusMode}
           setFocusMode={setFocusMode}
+          copilotEnabled={copilotEnabled}
+          setCopilotEnabled={setCopilotEnabled}
           optimizationMode={optimizationMode}
           setOptimizationMode={setOptimizationMode}
           fileIds={fileIds}
diff --git a/ui/components/EmptyChatMessageInput.tsx b/ui/components/EmptyChatMessageInput.tsx
index 43d1e28..195b8d3 100644
--- a/ui/components/EmptyChatMessageInput.tsx
+++ b/ui/components/EmptyChatMessageInput.tsx
@@ -11,6 +11,8 @@ const EmptyChatMessageInput = ({
   sendMessage,
   focusMode,
   setFocusMode,
+                                 copilotEnabled,
+                                 setCopilotEnabled,
   optimizationMode,
   setOptimizationMode,
   fileIds,
@@ -23,12 +25,13 @@ const EmptyChatMessageInput = ({
   setFocusMode: (mode: string) => void;
   optimizationMode: string;
   setOptimizationMode: (mode: string) => void;
+  copilotEnabled:boolean
+  setCopilotEnabled:(mode: boolean) => void;
   fileIds: string[];
   setFileIds: (fileIds: string[]) => void;
   files: File[];
   setFiles: (files: File[]) => void;
 }) => {
-  const [copilotEnabled, setCopilotEnabled] = useState(false);
   const [message, setMessage] = useState('');
 
   const inputRef = useRef<HTMLTextAreaElement | null>(null);
@@ -94,6 +97,7 @@ const EmptyChatMessageInput = ({
             />
           </div>
           <div className="flex flex-row items-center space-x-1 sm:space-x-4">
+            <CopilotToggle setCopilotEnabled={setCopilotEnabled} copilotEnabled={copilotEnabled}/>
             <Optimization
               optimizationMode={optimizationMode}
               setOptimizationMode={setOptimizationMode}
diff --git a/ui/components/theme/Provider.tsx b/ui/components/theme/Provider.tsx
index 43e2714..a02f08d 100644
--- a/ui/components/theme/Provider.tsx
+++ b/ui/components/theme/Provider.tsx
@@ -7,7 +7,7 @@ const ThemeProviderComponent = ({
   children: React.ReactNode;
 }) => {
   return (
-    <ThemeProvider attribute="class" enableSystem={false} defaultTheme="dark">
+    <ThemeProvider attribute="class" enableSystem={false} defaultTheme="light">
       {children}
     </ThemeProvider>
   );
diff --git a/ui/lib/mcid.ts b/ui/lib/mcid.ts
new file mode 100644
index 0000000..1a0d0d3
--- /dev/null
+++ b/ui/lib/mcid.ts
@@ -0,0 +1,38 @@
+// utils/mcid.ts
+export class Mcid {
+  private lastTimestamp = -1;
+  private sequence = 0;
+
+  constructor(private readonly machineId: number = 0) {
+    if (machineId < 0 || machineId > 255) {
+      throw new Error('Machine ID must be between 0 and 255');
+    }
+  }
+
+  generate(): number {
+    let now = Date.now();
+
+    if (now < this.lastTimestamp) {
+      throw new Error('Clock moved backwards');
+    }
+
+    if (now === this.lastTimestamp) {
+      this.sequence = (this.sequence + 1) & 0xf;
+      if (this.sequence === 0) {
+        while (now <= this.lastTimestamp) {
+          now = Date.now();
+        }
+      }
+    } else {
+      this.sequence = 0;
+    }
+
+    this.lastTimestamp = now;
+
+    return (
+      (now * 0x1000) +      // 时间戳左移 12 位
+      (this.machineId * 16) + // 机器 ID 左移 4 位
+      this.sequence          // 序列号
+    );
+  }
+}